A passenger train on the Hudson Metro North line has derailed in the Bronx. Four people are so far reported dead, and more than 60 people have been reported injured.

No cause has yet been determined, but the train left the tracks near the Spuyten Duyvil station around 7:20 AM, according to the New York Times. It originally departed at 5:54 AM from Poughkeepsie. For context, Metro North serves the area just north of New York City, including Westchester County and Southwestern Connecticut. It is the second-busiest commuter railroad in the country, after its sister railroad on Long Island.

This is not the first train to derail in an extremely similar spot, as a train hauling waste derailed in a dramatic fashion in the Spuyten Duyvil section back in July.

We'll update you as we have more information.

Photo via AP

UPDATE: Four people are dead, and 48 have been injured, according to Sarah Boxer of NBC News. Two of the people were fatally ejected, according to the Daily News.

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UPDATE #2: This is the approximate area in which the derailment occured:

UPDATE #3: A senior state official just confirmed to ABC News that neither criminal activity nor terrorism are immediately suspected. Eleven people are critically injured. The train was moving faster than normal, according to witnesses on the train.

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UPDATE #4: As of 10 AM, at least 60 are now reported injured. Divers are searching the nearby river, and teams are searching the nearby trees for casualties.

UPDATE #5: A New York Fire Department spokesman said that although firefighters had to use airbags to remove the injured from underneath the train, and cutting tools to extricate those trapped inside, no further deaths are expected. Let's hope that remains the case.